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Instructions:
Midterm Exam for Stat 200 Accounting
Instructions:
The quiz is worth a total of 100 points. Your Exam score, along with comments, will be displayed in your assignment folder.
This exam includes open book and open notes, and you may take as much time as you want on it as long as you submit the quiz by the due date listed in our syllabus’s course schedule. You are allowed to consult your textbook, notes, and online classroom materials, but not anybody else.
To get full credit, you should exhibit all of your labor. You may only receive partial or no credit if you do not exhibit your work.
Please type your answers in your copy of the quiz, or create a document containing your answers if you like. Work that has been scanned is also acceptable. Make care you sign the document with your name. In the Quizzes Module, review the guidelines for submitting your quiz.
Please contact me by e-mail (Jose.Martinezcastillo@faculty.umuc.edu) if you have any questions.
You must include the following dated statement with your name entered in place of a signature at the end of your quiz. You’ll get a zero if you don’t sign this statement.
I completed this quiz entirely on my own, with no assistance from anyone other than the instructor. On this question, neither I nor anyone else has offered or received assistance.
James Shanique V.’s full name is James Shanique V. Date: 19 June 2021
1. The ages of a group of tourists visiting the Library of Congress are as follows:
36, 38, 33, 44, 37, 37, 38, 34, 34, 36, 34, 40, 42, 41, 35, 48, 31, 33, 46, 47, 33, 36, 37, 37, 34, 39, 35, 37, 36, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39,
a) Create a histogram of the ages with a 5-year class width.
b) Calculate the dataset’s mean.
b) Determine the dataset’s median.
2. True or false based on the following dataset: 13, 13, 15, 15, 16, 16, 16, 17, 18, 22.
a) The dataset above has a maximum value of 22. If the analyst makes a mistake and records it as 2.2, the mean and median of the dataset will be affected. Calculations should be displayed.
b) If a dataset’s variance is 0, then all observations must be zero as well.
c) The dataset’s standard deviation cannot be negative.
d) A dataset’s variance is always positive.
e) The graphs below show a negative correlation:
3. Three of thirteen smartphones in a shipment have damaged screens. What is the chance that the first 10 sold have an undamaged screen if they are sold in a random order?
4. There are a variety of outcomes that can occur when you toss a fair six-faced die twice:
a) Determine the sample space’s number of possible outcomes. Give an explanation for your response.
b) Determine the chances of getting a number larger than 5 on the first toss. Demonstrate your work and express your solution in the simplest fraction form possible.
c) Determine the likelihood that the total of the two throws is at least 7. Demonstrate your work and express your solution in the simplest fraction form possible.
d) Given that you acquire a number greater than 2 in the first toss, calculate the chance that the sum of the two tosses is at least 7. Demonstrate your work and express your solution in the simplest fraction form possible.
e) If event A is “getting a number bigger than four in the first throw” and event B is “the sum of two tosses is at least eight,” then Are events A and B self-contained? Justify your response.
5. SAT Math scores are regularly distributed with a population standard deviation of 200 for all seniors in a high school. Determine: If 100 seniors from the school are chosen at random and their SAT Math scores have a sample mean of 650,
1. What distribution will you use to calculate the crucial value for a confidence interval estimate of the mean SAT Math score for High School seniors? Why?
2. Create a 95 percent confidence interval estimate of the mean Math score for High School seniors. Demonstrate your effort and round your answer to the nearest two decimal places.
6. You have eight blue and eight green clothes in your closet. On Monday, you choose a shirt at random, and on Tuesday, you choose a different shirt. On Monday, you wear a blue shirt and on Tuesday, you wear a green shirt. Determine if the scenario contains an independent or dependent event. Calculate the probability.
7. You’re changing the four-digit lock’s combination. You only care about the number 1234, not the order in which it appears. Determine the number of options.
Is a 90% confidence interval estimate of the mean SAT Math score wider than the 95% confidence interval estimate you derived from part 2 of Problem 5)? Why? It is important to note that the 90 percent confidence interval does not have to be constructed.
9. Assume that the population is distributed regularly. The following hypothesis test is performed using a sample size of 225, a sample mean of 750, and a standard deviation of 30.
H0: = 745 H0: = 745 H0: = 745 H0: = 7
745Haaaaaaaaaaaaaaaaaaaa
(a) Is this a proportional, mean, or standard deviation test? For the critical value, what distribution should you use?
(b) What is the significance of the test statistic? (Exhibit your work and round to three decimal places.)
(c) What is the significance of the p-value? (Show your work and round your answer to the nearest two decimal places.) You must specify the processes if you employ technology to calculate the P-value).
A chemical test was given to 500 students. You took a random sample of 100 students to calculate the average and standard deviation. In calculating the standard deviation, how many degrees of freedom were there? (Explain why you deserve full credit.)
(a) 500; (b) 499; (c) 100; (d) 99; (e) 100; (f) 99; (g) 99; (h) 99;
Excel spreadsheet with online applet on hackmath.net (NORMINV)
RUBRIC |
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Excellent Quality 95-100%
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Introduction
45-41 points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned. |
Literature Support 91-84 points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned. |
Methodology 58-53 points Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met. |
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Average Score 50-85% |
40-38 points More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided. |
83-76 points Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration. |
52-49 points Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met. |
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Poor Quality 0-45% |
37-1 points The background and/or significance are missing. No search history information is provided. |
75-1 points Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration. |
48-1 points There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met |
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Midterm Exam for Stat 200 Accounting |
Midterm Exam for Stat 200 Accounting